hSPC mRNA expression in normal AEC (obtained from non-fibrotic lung) was 1.43 ± 0.01, however mRNA expression of hSPC increased after BMSC-cm treatment (4.49 ± 0.84) compared to the untreated IPF AEC (1.62 ± 0.17) (p < 0.001). Here, PSMA7 is linked to idiopathic pulmonary fibrosis.